Inspector Stefan Krupp is baffled when the fourth body is found. It apppears to bear the same mutilations as the others, but there are inconsistencies. Krupp is faced with a new dilemma. Is a clever killer trying to confuse the police, or are there two vicious killers on the loose with different motives? Soon, when another body is found, Krupp must finally accept what his instincts tell him. The killer is someone he knows. Now, he must prove what his gut tells him before someone else is killed...or he is.